Answer to Define base level and distinguish between ultimate base level and temporary (local) base level..
Niger is a oily seed which makes it an excellent energy source for the birds that eat it. But its oily nature also causes it to dry out AND LOSE ITS ATTRACTIVENESS TO BIRDS.Birds will turn their beaks to old niger seed.Avoid waste by only purchasing niger in a quantity you'll use in a month or two.ou may also see it called NygerÂ®. 3) NIGER SEED HAS A SHELL. As small as it is, a niger seed does have a shell. If you think birds aren't eating the seed because you see some on the ground, examine it more closely: you may be seeing mostly the thin niger hulls.
The sunflower seed is the fruit of the sunflower (Helianthus annuus). The term sunflower seed is actually a misnomer when applied to the seed in its pericarp (hull).Botanically speaking, it is a cypsela. When dehulled, the edible remainder is called the sunflower kernel or heart. There are three types of commonly used sunflower seeds: linoleic (most common), high oleic, and NuSun.f the husk is solid black, the seeds are called black oil sunflower seeds. The crops may be referred to as oilseed sunflower crops. These seeds are usually pressed to extract their oil. Striped sunflower seeds are primarily used for food; as a result, they may be called confectionery sunflower seeds.